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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@HughB
@Sham1969 - I would concur with your experience.
Things that have stretched it out to 2 weeks for me are.
1) Turn wake on twist off - I'm happy to press the button if I want the backlight
2) Turn the LCD brightness down to 0.4
3) Reduce LCD timeout to 5 seconds - this can be a pain if you are slow in the launcher.
4) Make sure Health / Heart rate monitoring is off - even at 10mins it uses a lot of juice.
I agree the battery falls off a cliff after 30%. I've powered off twice by running out. I now recharge once I get to 40%.